Pair the unleashed banner with the downloads chart 8:2 on one row

The cumulative-downloads chart on its own line ate too much vertical
space for what is essentially a sidebar metric. Move the banner and
chart into a single 960-wide table row at an 8:2 column split (banner
760, chart 190) so the chart reads as the visual sidebar the data
actually warrants while the banner keeps its prominence.

Co-authored-by: Open Codex <hff582580@gmail.com>

Author: LEON-gittech

README.md

@@ -17,18 +17,21 @@
   <a href="https://www.npmjs.com/package/@leonw24/open-codex"><img alt="npm total downloads" src="https://img.shields.io/npm/dt/%40leonw24%2Fopen-codex?label=total%20downloads" /></a>
 </p>
 
-<p align="center">
-  <a href="https://www.npmjs.com/package/@leonw24/open-codex"><img src="https://raw.githubusercontent.com/LEON-gittech/Open-Codex-CLI/main/.github/npm-total-downloads.svg" alt="Open Codex CLI cumulative npm downloads chart" /></a>
-</p>
-
 <p align="center">
   <a href="#english"><img alt="English" src="https://img.shields.io/badge/English-default-111111?style=for-the-badge" /></a>
   <a href="#简体中文"><img alt="简体中文" src="https://img.shields.io/badge/简体中文-switch-444444?style=for-the-badge" /></a>
 </p>
 
-<p align="center">
-  <img src="https://raw.githubusercontent.com/LEON-gittech/Open-Codex-CLI/main/.github/open-codex-cli-unleashed.png" alt="Open Codex CLI unleashed banner" width="960" />
-</p>
+<table align="center" width="960">
+  <tr>
+    <td width="80%" align="center">
+      <img src="https://raw.githubusercontent.com/LEON-gittech/Open-Codex-CLI/main/.github/open-codex-cli-unleashed.png" alt="Open Codex CLI unleashed banner" width="760" />
+    </td>
+    <td width="20%" align="center">
+      <a href="https://www.npmjs.com/package/@leonw24/open-codex"><img src="https://raw.githubusercontent.com/LEON-gittech/Open-Codex-CLI/main/.github/npm-total-downloads.svg" alt="Open Codex CLI cumulative npm downloads chart" width="190" /></a>
+    </td>
+  </tr>
+</table>
 
 <p align="center">
   GitHub README does not allow JavaScript-based language toggles, so this page uses collapsible language sections as the practical equivalent.